* {
  margin: 0;
  padding: 0;
}
a {
  text-decoration: none;
  color: #3a3a3a;
  transition: 0.2s;
}
a:hover {
  color: var(--base-color) !important;
}
body {
  background-color: rgba(230, 230, 230, 0.1);
}
main {
  position: relative;
}
main .top-info {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 40px;
  background-color: #456;
  padding: 0 0 0 20px;
  z-index: 111;
}
main .top-info .logo {
  font-size: 18px;
  line-height: 36px;
  color: aliceblue;
}
main .top-info .logo a{
  color: #c9c9c9;
}
main .top-info .info {
  position: absolute;
  top: 9px;
  right: 50px;
  color: #a1a1a1;
}
main .left-nav {
  position: fixed;
  top: 40px;
  left: 0;
  width: 200px;
  background-color: #456;
  height: 100%;
  color: #fbfdff;
  z-index: 11;
}
@media (max-width: 768px) {
  main .left-nav {
    width: 150px;
  }
}
@media (max-width: 430px) {
  main .left-nav {
    width: 100px;
  }
}
main .left-nav ul {
  list-style: none;
  padding-inline: 0;
  text-align: center;
}
main .left-nav ul li {
  padding: 10px 0;
}
main .left-nav ul li:hover {
  background-color: rgba(240, 248, 255, 0.151);
  cursor: pointer;
}
main .left-nav ul li.active {
  background-color: aliceblue;
  color: #456;
}
main .content {
  margin-right: 30px;
  margin-top: 50px;
  margin-left: 220px;
}
@media (max-width: 768px) {
  main .content {
    margin-left: 160px;
    margin-right: 10px;
  }
}
@media (max-width: 430px) {
  main .content {
    margin-left: 100px;
  }
}
main .content .manage {
  padding: 10px;
  font-size: 18px;
}
main .content .manage h1 {
  margin-bottom: 14px;
}
main .content .manage .manage-item {
  margin: 16px 0;
}
main .content .manage .manage-item input,
main .content .manage .manage-item textarea {
  width: 50%;
  padding: 4px;
  border-radius: 4px;
  border: 1px solid rgba(68, 68, 68, 0.473);
}
@media (max-width: 768px) {
  main .content .manage .manage-item input,
  main .content .manage .manage-item textarea {
    width: 100%;
  }
}
main .content .manage .manage-item textarea {
  border-radius: 6px;
}
main .content .manage .submit {
  margin-top: 20px;
  width: 100%;
}
main .content .manage .submit input {
  width: 50%;
  font-size: 20px;
  padding: 10px;
  border-radius: 10px;
  border: 1px solid rgba(68, 68, 68, 0.466);
}
main .content .manage .submit input:hover {
  cursor: pointer;
  background-color: #cecece;
  border: 1px solid #444;
}

@keyframes msg {
  100% {
    opacity: 0;
    transform: translateY(-20px);
  }
}
.msg-box {
  position: fixed;
  left: 30vw;
  top: 10vh;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 111;
}
.msg-box .msg {
  width: 40vw;
  border-radius: 30px;
  padding: 10px;
  box-shadow: 0 0 10px 3px rgba(177, 177, 177, 0.5);
  animation-duration: 1.2s;
  animation-delay: 3s;
  animation-name: msg;
  animation-fill-mode: forwards;
  margin: 8px;
}
.msg-box .msg.success {
  background-color: #9ee18d;
}
.msg-box .msg.info {
  background-color: #8dc5e1;
}
.msg-box .msg.error {
  background-color: #e18d8d;
}
.msg-box .text {
  font-size: 16px;
}